Bart for Model Number SCB1000MBB01 Suspecting the humidity sensor has failed b/c any cooking that provides an increase in humidity within the unit causes the digitron display to become erratic and eventually go black. After airing out the unit and power-cycling the unit I am able to eventually restore full function. Would like to know where the sensor is located and whether the Pwr Ctl Board is still in the mix of suspected failure. BTW, the GE unit is firmly installed as a built in and I will be unable to "pull it" despite having removed the 4 screws in the front. Thinking about the rear wall which is in a closet. Pushing the unit may be my only means of removing it once I open up that wall. My approach would be to apply pressure at the bottom and sides intermittently until the unit is freed. Any reason NOT to do that?
Answer Hello Bart, thank you for contacting AppliancePartsPros.comThe humidity sensor WB27X10857 is located on the left side of the microwave towards the rear and requires the unit to be uninstalled and the outer cover removed.The display's erratic behavior and eventual failure may not be related to the humidity sensor itself. If you can access the boards behind the control panel I would first check for loose connections, wires not fully seated in their connectors, and corrosion, as this sounds like poor connectivity or possible moisture intrusion as the unit heats up and humidity increases. To remove the control panel the unit will need to be at least partially uninstalled.With the 4 screws in front removed from the side trims, the microwave should slide/pull forward with 2 people grasping the front and rear of the unit underneath on each side. If the unit is not coming out of the install location it will need to be determined what is holding it in place. Read More... Answered by AppliancePartsPros.com | Monday, July 21, 2025